The BFCN-2840 from Mini Circuits is a Band Pass Filter with Frequency 2.75 to 2.93 GHz, Bandwidth 180 MHz, Center Frequency 2840 MHz, Insertion Loss 1.6 to 7 dB, Rejection 20 dB @ 1550 and 4000 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-2840 can be seen below.